Matthaus wrote:As U235 said they're a quality built indestructible unit. In addition they are the most efficient design out there, the AHS shares many of the Axeman design attributes and is also very efficient.
The Keystoker, EFM and Harman companies are three manufactures that support existing and past designs of their boiler models. None of these three are as efficient as the Axeman/AHS design...
Efficient, efficient, efficient; is what we all want! To get the most heat, to heat us; not the chimney. Without a picture from a brochure or from a unit that someone owns, it maybe difiicult to answer; but, can anyone tell us exactly what is so unique about the Axeman/ AHS heat exchanger? Does it have an external heat exchanger scraper rod?
Of the three other brands, which is the second runner up; in being efficient. If it is Keystoker, are all of their air stoves and furnaces; of the same efficient design? If it is not Keystoker, has anyone determined which brand has the most efficient air furnace and/ or stove?